Skate sharpener



' Dec. 30, 1930. H. THORNGREN n 1,786,553

SKATE SHARPENER H. THORNG REN SKATE SHARPENER Dec. 30, 1930.

Filed April ll, 1927 2 Sheets-Sheet 2 HELMER THORNGBEN, 0F DETROIT, YEICEIG-N SKATE SHARPENER Application filed April 11,

The present invention pertains to a novel skate Sharpener having for its principal object a device which may be used at a skating rink or on the ice to sharpen a 5 skate while on the foot or" the skater.

The construction which enables the realization of this object consists essentially of a frame or housing supporting a if'ertically adjustable motor which carries an abrasive 30 Wheel. This adjustability or" the motor permits regulation of the efectivo cutting edge with reference to a lined support for the skate. The invention includes further a suitable guide and travelling member Which r restrict the skate to a definite straight line path over the cutting edge. The skate, after being properly adjusted with reference to the guide and travelling member, is oscillated over the cutting edge merely by a corresponding swinging movement of the leg ot the skater.

The invention is fully disclosed in the Jfollowing description and in the accompanying F drawings, in which- Figure 1 is a plan vievv of the device;

Fig. 2 is a side elevation thereof, partly in section;

Fig. 3 is a front end elevation;

Fig. l is a detail horizontal section showing the supporting means for the motor;

Fig. 5 is an elevation of the skate clamp;

Fig. 6 is an elevation ot the clamp at right angles to Figure 5; and

Fig. 7 is a detail vertical section.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

The frame or casing oic the device comprises a housing 1 of box-like construction standing on legs 2.

The frame is further provided with an upper yoke 3 having its sides l riveted to the sides of the member 1 and extended in the form of additional legs 5. To the members 3-4 are pivote-d another pair of legs 6 which swing outwardly with respect to the trame in order to provide a lateral support in the manner illustrated in Figure 3.

@ne of the Walls of the housing 1 is struck 1927. Serial No. 182,646.

the members 8 and 9 are lixed to each other and to the wall by pins 10 as shown inFigure 4. This structure provides a support for a motor 11 having its base 12 equipped with a pair of channel shoes 13 slidable on the` bars 9. A. boss 14 extends from the base 12 through a slot 15 cut in the wall 7 A screw 16 threaded in the boss passes through a slot 17 in the back of the strap 8, and the motor assembly may be locked in any de- 0 sired position vertically of the slot 17 by a nut 18 threaded on the screw 16 and adapted to be clamped against the outer face of the strap 8. The motor is raised and lowered by a vertical screw 1 having a head 17 which rests on the top of the casing l. Current is supplied to the motor by a conductor 19 leading from any external source of current and passing through a wall of the housing 1 as indicated by the numeral 2O in Figure 2. rl`he supply of current may be controlled by a switch disposed at any convenient position. n

The shaft 21 of the motor carries an abrasI e Wheel 22 having a portion thereof projected through a relatively .short slot 23 cut in the top of the casing 1. lt will be seen that the wheel 22 is disposed at an acute angle to the axis of the housing due to the support ol the motor on the inclined wall 1' and the slot 23 is cut accordingly. Adjacent the slot however is a guide plate 24: lying parallel to the axis ot the housing.

fit one edge oi' the housing is secured a ver-- tical guide e by means ot angle irons plat rhe silate a which is to be sharpened while on the tootot the skater is placed longitudinally ot the housing, against the guide L spaced vfrom the guide lint the movement of the t `v of the housjain aria t Vere is provl ed a spa\J member comthe body or intermediate part 28 and and 30 extending from the ends theres of at "ight angles thereto and to each other.v

The leg Q9 has ar pivot lug;- 8l to which is pivotally attached a clamping arm 32. T he end in line with the intermediate section QS has e, lug 33 adapted to engage this end. Two such devices ere applied to the ends of the skate, and the blade is received between the members 2S and The upper end of the arm has an internally threaded boss Bat accommodatingl a scre'f.T 35 which bears against the arm 29. By means of this screw the boss may be spaced from the arm 29 whereupon a clamping action is ellected on the blade at the other end. The section :28 serves es a spacer between the guides 24 and 25, as shown in Figure 3, and the arm 30 is doubled over as at 36 to form a shoe or clip straddlinsoT the guide 25 and slidnble along the same.

In thc operation of the device the user applies the clamps 2S-36 to the` ends oi| the skate While on the feet as shown in Figure il. The foot is moved along the guides While the motor is in operation. Gbviously the skate vill be confined to astreight line path by virtue of guide and spacer constructions already described. The skate is prevented from being carried off the longer guide Q5 lirst by a rise 37 at each end of its upper edge and next by stop pins 38 passingv through the upper corners thereof and engageable by the clips 30, 36 in the event that these members are carried as far as the pins.

The apparatus may be carried from place to place by the yoke 8, and the several pointed legs thereof permit it to be rested on an ice surface without slipping. The eX- tent of projection of the Wheel 22 through the slot 23 is governed by the adjustment ot' the screw 16 vertically of the slot 17 in the strap 8.

Although a. specific embodiment of the invention has been illustrated and described, it will be understood that various alterations in the details of construction may be mede without departing 'from the scope ot' the invention as indicated by the appended claim.

lV hat I claim is A skate Sharpener comprisingjl a frame, a motor adjnstabiy mounted in said freine, an abrasive wheel mounted on the shaft of said motor` said abrasive Wheel slightly extending through a slot in said frame, a guide plate spaced from said Wheel and et e substantial acute angle to the axis of said wheel, said guide plate being formed with up-euryed ends, a skate clamping member slidable on said guide plate and adapted to support the skate, the rip-curved ends of the guide plate being adapted to rock the skate while in oontact with said Wheel, and e second guide f member disposed adjacent said Wheel for direct engagement n'i'li the skate.

y Whereo; .Ti my signature.

HELMER THoRNG-REN. 

